Electric water-heater.



e. A. BURROUGHS & WQGRANT.

ELECTRIC WATER HEATER. I APPLICATION FILED Q0118, I915- 1, 1751234. Patented Mar. 14, 1916.

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' I l I l I I I I I l I I I E5 BURRUUEHE I [1/ 5H 77 l7) UNITED srarns PATENT orrrcr GEORGE ALEXANDEB BURRO'UG'HLS AND WILLIAM GRANT, 0E S'O'DB'URY, ONTARZO,

CANADA.

ELECTRIC WATER-HEATER.

Original application filed January 9, 1913, Serial No. 741,095.

To all whom it may concern:

Be it known that we, Gnoncn i\LEXANDER Bunnoucris and WILLIAM: GRANT, both of Sudbury, in the Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements'in Electric lVater-Heateisot which the following is the specification.

This invention relates to improvements in electric water heaters adapted to be utilized in conjunction with the electric heating ele ment described in my patent application Serial No. 741,095, from which the present application has been divided, and the objects of the-invention are to provide a simple and effective form of heater in which the water will be readily and quickly heated.

A further object of the invention is to construct a heater which will remain hot for a considerable time after the current has been turned oil from the heating element.

A further object still is to adapt the.

heater for the heating of water in heating systems of dwellings and the like, and it consists essentially of the improved construction hereinafter described in detail in the accompanying specification and drawings.

'In the drawing, Figure 1 is a sectional elevation of an embodiment of the invention as applied to a hot water furnace. Fig. 2 is an elevation of an alternative embodlment of the invention. Fig. 3 is a sectional detail through the heating chamber of the alternative form of the invention, the heating element being in elevation.

Like characters of reference refer to like parts in the several figures.

Referring first to the form shown in Fig. 1, A.represents an ordinary hot water furnace embodying the present invention and includes the header B which, as far as the present invention is concerned, forms the water heating chamber. tends transversely across the rear of the furnace and communicates with the outlet pipes 10 of the water circulating system which lead to the radiators.

Following the present invention the water heating chamber 13 is constructed in the form of a vacuum chamber, that is to say it is provided with double walls 11 and 12, the space 13 between which is exhausted. The header B is adapted to house an electric Specification of Letters Patent.

- tween which This header ex- Patented Mar. 1%, 1916. Divided and this application ales October Serial No. 58,58.

heating element C- which ,extends longitudinally through the said header and is supported from plugs 14: and 15 in the ends thereof.

it will be seen that a space is provided between the coil C and the wall of the chamber B and in this space the water may circulate and be heated and after the currcnt, is turned off the water within the chamber l3, owing to the vacuum between the double walls, will be kept at a high temperature. It will he found most convenient to use this form of device as auxiliary to the furnace, that is to say, the 'main body of water may be brought to a suitable temperature by the furnace itself and then the fire in the furnace may be either kept low or allowed to go out, the water in the coils being maintained at the proper temperature by the operation of the resistance coil.

in the embodiment of the invention illustrated in Figs. 2 and 3, the furnace is dispensed with and the heating chamber B is cylindrical in form and provided with an inlet 30 to which the return pipes 81 from the heating system are connected and an outlet to which the main 33 leading to the radiators is connected.

The water heating chamber is provided with double walls 34: and 35, the space-beis evacuated. Ehe electric heating element C extends longitudinally of the chamber B and is similar in form to that shown in Fig. 1, the passage of water on the interior of the chamber to the main pipe 33 taking place through a perforated sleeve 37 ,which connects the two. The arrangement is preferably such that the heat ing coil C may be withdrawn through the 1. In a device of the character described,

a water circulating chamber having inlet and discharge conduits, a vacuum Jacket surrounding the said chamber, an electric heating element in the Water circulating chamber, and a perforated sleeve adjacent to the discharge conduit designed to engage the heating element.

2. The combination with a hot Water furnace having a header from which circu v latin'g pipes lead and an electric heating coil extending through the header, a removable plug in the end of the header operatively supporting the heating coil, and a vacuum chamber surrounding the heater, the said GEORGE ALEXANDER BURROUGHS. WILLIAM ,GRANT.

Witnesses:

' GLADYS HELEN IRWIN,

GEORGE EDMUND BUCHANAN. 

